Dorsal snorkel



FIG. 1 is a perspective view of a dorsal snorkel in accordance with the present design;

FIG. 2 is a perspective view of a dorsal snorkel;

FIG. 3 is a top view of a dorsal snorkel;

FIG. 4 is a side elevational view of a dorsal snorkel;

FIG. 5 is a front elevational view of a dorsal snorkel;

FIG. 6 is a side elevational view of a dorsal snorkel;

FIG. 7 is a back elevational view of a dorsal snorkel; and,

FIG. 8 is a bottom view of a dorsal snorkel. 

The ornamental design for a dorsal snorkel, as shown and described. 